SELF ASSEMBLY OF ABC TRIBLOCK COPOLYMER THIN FILMS ON A BRUSH- COATED SUBSTRATE *
SELF ASSEMBLY OF ABC TRIBLOCK COPOLYMER THIN FILMS ON A BRUSH- COATED SUBSTRATE *
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DOI：
10.1142/s0256767909004266
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发表时间：
2009-07
影响因子：
4.3
通讯作者：
Zhibin Jiang;Rong Wang;G. Xue
中科院分区：
文献类型：
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作者：
Zhibin Jiang;Rong Wang;G. Xue
利用自洽场理论研究了ABC三嵌段共聚物薄膜在密集刷涂基底上的自组装。中间块B和涂覆聚合物形成一个相，当中性或选择性硬表面（与刷涂基板相反）的薄膜非常薄时，就会出现交替的A相和C相。当片层相为中性时，它在硬表面上是稳定的，有趣的是，短块倾向于留在硬表面上。接枝聚合物与ABC嵌段共聚物表面附近存在圆柱相时，形成波纹结构。由于亲水性刷涂表面作为薄膜软表面的存在，薄膜中存在的被两个硬表面约束的能量波动消失了。研究结果有助于在BC二嵌段共聚物中加入功能短嵌段A等功能化薄膜的设计和实现。
Self assemblies of ABC triblock copolymer thin films on a densely brush-coated substrate were investigated by using the self-consistent field theory. The middle block B and the coated polymer form one phase and the alternating phase A and phase C occur when the film is very thin either for the neutral or selective hard surface (which is opposite to the brush-coated substrate). The lamellar phase is stable on the hard surface when it is neutral and interestingly, the short block tends to stay on this hard surface. The rippled structure forms when the cylindrical phase exists near the surface between grafted polymers and ABC block copolymers. Due to the existence of the hydrophilic brush-coated surface serving as a soft surface of the film, the energy fluctuation existing in the film confined by two hard surfaces disappears. The results are helpful for designing the nanopattern of the film and realizing the functional thin film, such as adding the functional short block A to the BC diblock copolymer.